Trying to create a Wireguard Server on the Flint/ Help Port Forwarding

jdub · 2022-11-24T03:17:44.908Z

Different strokes, different folks, but there’s a reason you generally want to terminate your VPNs on the edge of your network.

It’s not a coincidence that many of the support questions in here are something like, “I decided to stick this gl-inet device behind my ISP router and why is it not magically routing all of my LAN traffic out to the VPN like I think it should.” (or some variant of that).

If you understand networking, yes, you can make almost any setup work. But for most home users, having a single router at the edge of the network that’s doing all of the NAT/VPN/routing is probably the best solution.

wcs2228 · 2022-11-24T03:22:53.611Z

There are always different reasons and different circumstances. The OP asked specific questions about port forwarding and we should help him by sharing our knowledge and experience, not just saying “you disregarded my advice in your original post to replace your router with the Flint”. He did not ask for your general advice and your advice is not the only solution…

jdub · 2022-11-24T03:26:52.446Z

Except they did ask for general advice in a previous post, and then deleted it.

Look, I’m sympathetic here, and maybe I’ve just done enough dumb things that I’m at the point that I’d like somebody to tell me if there’s an easier way to accomplish something - or at least ask me some questions about what I’m really trying to accomplish. If there’s a valid reason to keep the main router, great! We can work with that! But if I can save somebody hours of frustration by saying, “Have you considered swapping the routers?” I’m going to at least ask. Sorry if that offends you.

wcs2228 · 2022-11-24T03:28:50.358Z

Think about it. Why did he disregard your previous advice? Maybe he did not want to follow it.

jdub · 2022-11-24T03:29:56.776Z

Even though the original suggestion was ignored, I did try to help with his current issue. Perhaps I should just move on?

wcs2228 · 2022-11-24T03:31:14.341Z

Yes, maybe you shouldn’t be trying to help people who disregard your advice … move on.

BTW. I added you to my ignore list already.

jdub · 2022-11-24T03:33:17.412Z

Look, happy to try to continue to debug the problem if @pedritocs97 would like. Not my intent for things to get testy.

pedritocs97 · 2022-11-24T08:09:47.477Z

@jdub absolutely sorry for “ignoring” the previous post - I wanted to edit and add more information - so decided to delete it and create a new post. Sorry about it.

So, a few updates: Yes I do know the Main Router as ISP → port forwarding to Flint
In terms of your comments:

I tried to connect my device to different WiFis
Also tried to use mobile network (instead of Wifi)
Also tried to “expose” to the internet and try the WG - did not work

I also tried to use different ports instead of the default. Also tried to create a Rule under Firewall → Open Ports on Router (for UDP)

If I go to Dynamics DNS and try “DDNS Test” I have the following message :

image675×597 20.7 KB

Final note - because I have the Flint and the Slate Plus - I tried for both (the Mac Address matched 100% for Slate and similar to Flint)

I have looked for guidelines on my ISP router (available online) and I think I’m doing everything correctly…

thanks again

pedritocs97 · 2022-11-24T08:10:35.960Z

How can I make sure I have a static public ip address?
I also tried DDNS → did not work

alzhao · 2022-11-24T08:17:26.794Z

The ddns test function is buggy.

But from the images seems that you didn’t enable ddns.

Try test your ddns using dnschecker.org

pedritocs97 · 2022-11-24T08:26:30.854Z

I activated the DDNS now :

image720×528 18.2 KB

Does this mean it is working? (your website)

image1035×544 140 KB

This, however, does not change anything in terms of Port Forwarding from the ISP, right?..

Should I try to do what I was doing but edit the WireGuard Peer Endpoint to DDNS:PORT ?

alzhao · 2022-11-24T08:31:24.429Z

pedritocs97:

WireGuard Peer Endpoint to DDNS:PORT

You can just edit.

It seems you just enabled the ddns so it takes time to propagate. It should takes 10 minutes.

pedritocs97 · 2022-11-24T09:00:00.764Z

updating here, 25min have passed and your website looks better:

image1833×720 108 KB

I have checked and I do have a Public IP : DHCP enabled - YES

the info I get:

image933×1737 97.1 KB

I saw your another post and on Android I do not have the info you highlighted : Wireguard Server on GL-AXT1800 Slate AX - #5 by alzhao

what should I do?

alzhao · 2022-11-24T09:01:34.034Z

So you have both vpn client and server configured on the router?

pedritocs97 · 2022-11-24T09:02:52.741Z

ISP router → Port Forwards → to Flint (Which has the WG Server Configured) → Then Client on Travel Router (Now testing with Android Device)

jdub · 2022-11-24T11:18:12.882Z

Ok, looks like you’re making some progress, so that’s good. My recommendation at this point would be to break the problem down and see where the issue is.

So I’d probably do:

start by making sure the Wireguard server is actually working correctly in the first place. Edit your config file to use the local (192.168.X.X) IP and get that working first.
find your public IP by googling “what is my IP”. Then try manually editing your file to connect to that IP. Leave the Flint as the DMZ host for the moment so we can eliminate that variable. Try this from your cell phone if you can, or from a completely different network (someone else’s house/apartment).
if that doesn’t work, it may be that your ISP is blocking inbound traffic. That’s usually not the case with high port UDP traffic, but possible.

We can always start looking at configs, etc, but if you’re DMZed then it shouldn’t be a forwarding issue.

Today is a holiday where I am, so I won’t have a ton of time to respond but I’ll try to check in on this as I can.

alzhao · 2022-11-24T15:17:53.055Z

Just an update: I checked with @pedritocs97 remotely and found that the ISP only gives IPv6 IP address. So thing are a little different now.

I will update once I get a solution.

pedritocs97 · 2022-11-24T15:44:26.325Z

I read somewhere that “IPv6 is not fully supported on the flint and may result in leakage on ipv6 connections. I would recommend you just not use it.”

Hopefully, I can still use it safely…

pedritocs97 · 2022-11-24T15:53:35.715Z

Hey, I actually found out I can do the following: " 1 Set up a public IPv4 subnet in the FRITZ!Box"

AVM Deutschland

Öffentliches IPv4-Subnetz in FRITZ!Box einrichten | FRITZ!Box 7430

Die FRITZ!Box kann auch an einem Internetanschluss mit mehreren festen ("statischen") öffentlichen IPv4-Adressen eingesetzt werden. Sie können Ihre Serverdienste bzw. Internetanwendungen im Internet somit direkt unter verschiedenen öffentlichen...

Does this work?

It was actually already set up and looks the following:

image1226×759 32.4 KB

edit: i think you are right, it says "Internet, IPv4: FRITZ!Box uses a DS-Lite tunnel "

jdub · 2022-11-24T18:09:45.054Z

What you’re looking at here is your internal IPv4 network, not an internet facing one. If your ISP allows you to get an external IPv4 address that would be what you’re looking for. The help page you posted would require your ISP to hand out those addresses.

IPv6 will make things more complicated in several ways:

If you’re planning on using it to connect back to your house while traveling you’ll need to have IPv6 at your remote site (generally not true in hotels). You can sort of get around this, probably, by building an IPv4->IPv6 tunnel (Hurricane Electric, maybe?), but goodness that’s a pain.
IPv6 just makes it easier to make mistakes and/or leak traffic over the IPv4 tunnel. It’s not that you can’t do it safely (if obfuscation of your traffic is the goal), but you just have to be a lot more careful.

Can you contact your ISP and see if there’s any way you are able to get an external IPv4 address (can be static or dynamic).